To answer your first point - there is not a simple safe answer apart from - if in doubt, leave well alone.
Question: does the pump have a two or three core cable and is your outside supply protected with a 30Ma RCD?
This thread is now locked and can not be replied to.
Best phone camera 2016/2017: Galaxy S7 vs iPhone 7 vs Google Pixel vs HTC 10 Evo vs OnePlus 3T vs…
1995-2015: How technology has changed the world in 20 years
The Pantone Colour of the Year 2017 is Green
Super Mario Run preview | Hands-on first impressions of Super Mario Run: Mario's iPhone & iPad…
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.